I take vitamin D also, but nowhere near 2000 IU. Is there ever a danger of taking too much vitamin D?
To my undertanding, you get about 10,000 IU from less than a half hour of full body sun exposure, so 2,000 IU doesn’t sound particularly problematic.
I know Vitamin C is water soluble, and dosage is to tolerance, meaning if you start having digestive issues, back off the daily intake until you no longer have problems.
You can have ill effects from too much Vitamin D. However, the same applies to water.
From what I’ve read, the upper limit on a consistent daily dosage before there’s a danger is 10,000 IU. I know people who take 50,000 each 2 weeks (plus, of course, what they get in their diet, which amounts to a few hundred a day), but if you average that out it is under 3,500 IU/day.
I, personally, wouldn’t take more than 5,000/day unless a doc told me to do so. What you take, or how much you receive via the Sun, in any one particular day, or even week, is of fairly low significance. You should be in absolutely no danger at 2,000 IU/day (though, of course, I’m not only not a doctor, I’m not your doctor, so this isn’t medical advice, yada, yada, yada) - and I take that much myself and have for a couple years. No ill effects, just less sickness (despite my horrid sleep habits, which by all rights ought to run down my immune system).